5 ms·
Hot water freezes faster than cold water (Mpemba Effect)
- ObieJazz 18y agoAnd yet, cold water doesn't boil faster than hot water. Weird.
- bdotdub 18y agoMan, everything I did for my third grade science experiment was a lie. Sorry Ms. Mariano
- cjc 18y agoExcept under very specific conditions, this is NOT TRUE. Do not fill your ice cube trays with hot water thinking it will freeze faster.
- adamc 18y agoSure, but the fact that it ever happens is fascinating.
- ars 18y agoAre you sure about that? Maybe I should try it. The article certainly contradicts you.
- delackner 18y agoIndeed, cjc sounds like someone who has already tried this at home, right? What circumstances are different between ice cube trays and ice cream mixture? High surface area comes to mind. In the article the experiments described all involve volumes of water (or ice cream goo) that are in containers with low surface area to volume. SA and Volume do not scale linearly, thus the heat exchange rate would be faster for the ice cube trays. Of course, TRYING it out would not hurt. Several hundred years worth of scientists seem to have laughed at previous experimental results out of some egotistical belief that experimental results passed down from history are fairy tales.
- aebj 18y agooh i will like i care what you say dumbo!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- sharkfish 18y agoMy father showed me how much faster hot water freezes in an experiment we did when I was a kid. How many of us owe our fathers for what seems to be innate curiosity now that we are adults :)
- whacked_new 18y agoAnd/or you inherited the curiosity trait.
- ars 18y agoI fall on the side of nurture with regard to curiosity. _Everybody_ has "the curiosity trait", but in some environments it's discouraged: "Stop asking so many questions.", or "I don't know and why do you care?", or simply giving wrong answers.
- sharkfish 18y agoOr the "prove your mom wrong" trait. That seemed to be his motivation, heh-heh.
- maximilian 18y agoI've done it a bunch of times and never had hot water freeze faster. How did you (or your dad) set it up?
- ujeezy 18y agoBoiled water freezes faster because the impurities have been burned out
- sniemyski 18y agomany people think many things. im doing this 4 a science project and so far hot water freezes faser then cold water except on artical
- sniemyski 18y agomany people think many things. im doing this 4 a science project and so far hot water freezes faser then cold water except on artical